★★Main game plays of Grand Battle★★
--Construct resource and military buildings for development,
--Construct various defense buildings to form world-class defense system
--Unlock, and train soldiers, tank, jet fighters, etc.
--Upgrade soldiers, tanks jet fighters, etc.
--Finish quests to speed up development
--Experience World War Ⅱ
--Use spy satellite to locate enemies and then destroy them

btw Now as i know, Grand Battle is now holding some activities in the game from 16:00pm, March 19th to 24:00pm, March 24th China Time. And players can get huge rewards for free. The detailed information about the activities can be seen in the Notice in the game.

Grand Battle Super news:
Grand Battle is holding another round of event due to the fact that some players didnt notice the previous activity and some players only get a few rewards. To respond to the activity request of a lot of Grand Battle players, Grand Battle is holding another different activity today but with more abundant rewards. So come on, take this chance to take as many rewards as you can. See who the winner is!!
You can check the Notice in the Game to know the details.